Ball-bearing.



UNrrnn STATES ATENT anion.

FRIEDERICH ERDSIEK, OI MINDEI', GERMANY, ASSIGNORATO HOPPE da HOMANN, 0FMINDEN, GERMANY, A FIRM.

BALL-BEARING.

SPECIFICATION forming part of Letters Patent No. 693,815, dated.February 18, 1902.

Application filed September '7, 1901. Serial No. 74,697. (No model.)

T0 all whom t may concern:

Be itknown that I, 'FRIEDERIGH ERDsIEK, workmaster, a subject of theKingof Prussia, German Emperor, residing at Minden, Westphalia, in theKingdom of Prussia, German Empire, have invented certain new and usefulImprovements in Ball-Bearings, of which the following is aspecification;

My invention relates to ball-bearings.

In ordinary ball-bearings two conical running or Working faces havehitherto been used for receiving the pressure of the balls, said conicalfaces being exactly adjusted to the two series of balls in order toobtain the smallest friction with the smallest possible extent of playor looseness and to compensate for wear of the surfaces. Greatexactness, (for instance, one one-thousandth of a millimeter,) as iswell known, is desirable for the adjustment, so as to obtain the besteffect. The adjustment of the ball-bearings hitherto used has beeneffected by direct screwing of conical cups against the series of balls.To secure the cups in position, clamping of the same or fixing by meansof teeth or pins has been resorted to hitherto. A Both the directadjustment as well as the methods of fixing the cups have greatdisadvantages, especially when an adjustment or regulation is necessaryon the road or racing-path in case the parts become Worn or requireadjustment. All these disadvantages are overcome by the constructionforming the subject-matter of the present invention.

The new construction comprises in contradistinction to the ball-bearingshitherto used two conical ball-race devices not adjustable toward andfrom one another, a screw-threaded ball-bearing cup being provided forthe adjustment capable of being indirectly r0- tated by means of aworin-wheel and two or more pins or equivalent devices actuated therebyin order to effect an exact positioning of the bearing-cups. A specialfixing of the ball-bearing cup after adjustmentl has taken place is notnecessary, as the wormwheel is secured against rotation by its worm, andtherefore also the ball-bearing cups themselves are secured againstunintentional movement. A form of construction of such a ball-bearing(as applied to the bottom is shown in the accompacranks are attached orformed integral therewith, these cups having central tubular extensions,the beveled ends c of which meet or nearly meet in the center of the huband are drawn together by means of a screw-bolt -c. In order to preventthe beveled ends or faces c from sliding over one another, thetightlyclosed casing d is slipped over the box of o. The rotation andadjustment of the outer ball-race 'part or cup b is avoided by means ofthis simple arrangement after tightening of the screw-bolt, so that thetwo cups or running surfaces must be considered as immovable toward eachother.

e is the inner bearing-cup for the left-hand series of balls,rigidlymounted in the casing af.

fis the adjustable bearing-cup for the righthand series of balls. Thebearing-cup fis screwed into the casing a and is provided with two pinst' t' or the like, which pass through or into the worin-wheel g androtate with it. The rotation is effected by means of a worm h gearingwith the worm-wheel g, the worm h being easily rotatable, but notlongitudinally movable within the chamber The worm-wheel g is preventedfrom lateral displacement by means of a projection z on the right-handside in the casing a, and by means'of a ringg/ at lits left-hand side.Arotation of the worm h to the left or to the right effects acorresponding rotation of the Worm wheel g and indirectly by means ofthe pins a similar rotation of the ball-bearing cup f, which is screwedthereby either farther into the casing a or out of the same, whereby theadjustment of the sets of balls in their races takes place. Thebearing-cupf is secured in any position against unintentional movementby the worm-wheel.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to beperformed, I declare thatwhat I claim isba11bearing cups one of which is screwed into the easingor hub, a Worm-wheel rotatably movable but incapable of longitudinalmovement in the casing behind said cup, a worm for operating saidWorm-Wheel and a eonneetion between the latter and the ball-bearing oup, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witmesses.

FRIEDERICII ERDSIEK.

lVitnesses:

FRITZ BURGMANN, L. RAsoH.

